One factor could be the power levels. If the fanfiction writer wants to boost Naruto's power in a new and different way, they might draw inspiration from Kaygua's power characteristics. So Naruto ends up with some traits that make him seem like Kaygua.
Well, in fanfiction, Naruto could be made to be like Kaygua. One similarity could be their combat styles. Maybe in the fanfic, Naruto adopts a more brutal and direct combat style similar to what Kaygua might have. Also, their backstories could be made alike in some ways. Both could be presented as having a difficult past that shapes their present personalities. However, this is all very much dependent on the creativity of the fanfiction writer.
Well, in such a fanfiction, Naruto might be unkillable because of some special power-ups. Maybe he has some kind of indestructible chakra shield that constantly protects him from any harm. It could also be due to a unique bond with a powerful entity that grants him immortality. Another possibility is that his willpower is so strong that it literally defies death, allowing him to survive any fatal situation.
In some fanfictions, Naruto might be feared due to his overwhelming power. For example, if he has some new and extremely dangerous jutsu that others can't understand or counter. It could also be because he has changed his personality to be more cold - blooded and less forgiving, which is a departure from his original kind - hearted self in the official story.
In fanfiction, Naruto can be made invincible by changing the rules of the Naruto universe. Maybe the author decides that there are no limits to how much he can train or that he has a special bloodline trait that no one else has. Also, if the author decides to remove all his enemies' advantages, it can make Naruto look unbeatable.
One thing that makes Naruto fanfiction hilarious is the use of situational humor. Picture Naruto in a modern - day setting like a shopping mall or a school. The contrast between his ninja ways and the normal world around him can create really funny scenarios. Another aspect is the parodies. Fanfictions that parody popular Naruto story arcs or character relationships can be extremely funny. They play on the readers' familiarity with the original story and add a humorous spin to it. And of course, when the author gives the animals in the Naruto world human - like personalities and makes them interact with the human characters in a comical way.
Another reason could be that the author stopped promoting it or abandoned it. If the author didn't keep up with the Naruto fandom's trends or didn't engage with readers, it could have faded into obscurity. For example, if a fanfiction had a very niche plot that didn't appeal to a wide audience at the time, it might have been quickly forgotten as more mainstream - appealing fanfictions emerged.
First, a good Naruto fanfiction needs to have a strong narrative. It could be a story that fills in the gaps of the original series, like what Naruto was doing during a certain time skip. The characters should be in - character. Naruto should still have his positive attitude and determination. Also, the fanfiction should add something new to the Naruto world. It could be a new jutsu or a new type of enemy that challenges Naruto and his friends in a different way.
There are several factors. First, the writing style matters. A fluid and engaging writing style can make the fanfiction a pleasure to read. Second, the connection to the source material. If it respects the lore and the established characters of Naruto while adding something new, it's great. For instance, if it expands on the history of the Uchiha clan in a way that makes sense within the Naruto universe. Third, the ability to evoke emotions. When a fanfiction can make you feel the same emotions as the original Naruto, like excitement during a fight or sadness at a character's loss, it can be considered beautiful.
A Naruto fanfiction can be sad when it delves into the sacrifices Naruto has to make. He gives up so much of his personal life and relationships for the sake of the village and his friends. If a story highlights how he loses his close friends, like Sasuke in some darker interpretations, it can be extremely sad. Additionally, if it shows Naruto being misunderstood by the people he's trying to protect, that also adds a layer of sadness. For instance, if the villagers still don't trust him despite all his efforts, it can be a very tragic situation for Naruto.
There are several factors. Firstly, the writing style matters a great deal. If the author has a way of vividly describing the action scenes, like Naruto's battles, and the emotional states of the characters, it can draw in a large audience. Another aspect is how well it ties in with the existing Naruto lore. Fanfictions that respect the original story while adding their own twists are more likely to become famous. Also, word - of - mouth plays a part. If readers enjoy it, they'll recommend it to others, and it'll gain more popularity.